The narrowest point in the gap between two members to be welded, or the point in the gap furthest removed from the electrode. Usually these points are one and the same.
glossary
glossary
A test in which the weld root is on the convex surface of a specified bend radius.
A weld crack originating in the root bead, which is usually smaller and of higher carbon content than subsequent beads. Crack is caused by shrinkage of the hot weld metal as it cools, placing the root bead under tension.
The intentional gap between members to be joined to assure 100% penetration in groove type welds.
The initial weld bead deposited in a multi-pass weld requiring high weld integrity.